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Show 1882.] REV. O. P. CAMBRIDGE ON NEW ARANEIDEA. 439 Family SALTICIDJ:. MAGO, g. n. Cephalothorax as high behind as it is long ; the posterior slope curved inwards, but almost perpendicular ; profile of upperside of caput slightly convex, and sloping a little forwards. The caput is exceedingly large, absorbing, in fact, almost the whole cephalothorax ; looked at from above, its upper surface forms nearly a square; the sides also are perpendicular. Height of clypeus less than the diameter of the fore central eyes. Ocular area slightly broader than long and equal in breadth before and behind ; fore central pair of eyes very large, and of a dull pearl-grey hue ; fore laterals in a line with base of fore centrals, and of same colour; posterior pair a little smaller than fore laterals, and as nearly as possible equally divided from them by the minute intermediate eye, which is placed a little inside of their straight line. Legs moderately long, tolerably strong, 1, 3, 2, 4; first pair much the strongest. Armed with spines, and with a small claw-tuft beneath the terminal tarsal claws. Falces long, straight, divergent, and directed forwards; denticulations small ; fang of moderate length and strength. Maxillce long, strong, straight, widened on both sides at the extremities, which are rounded. Labium long, about two thirds the length of the maxillae, and narrower at apex than base ; apex rounded. The direction of the maxillae and labium is very nearly perpendicular (or at right angles) to the sternum, which is small, nearly round, slightly pointed behind, and truncated in front; the truncation is very gently curved, the convexity of the curve directed backwards. Abdomen small, short-oval, very convex before, and fitting up pretty closely to the incurved thorax. This new genus is characterized with great diffidence, and chiefly on account of the form of the cephalothorax, of which the figures (Plate XXXI.) give a fair representation. There is very little difficulty in determining a Spider to be of this family; but to which of the now numerous genera it may belong is often a very difficult point to decide. It is a very questionable addition to our knowledge of this group (which now numbers nearly 1500 species) to establish, as is now constantly being done, new genera often most closely allied, without giving a single figure either of the Spider or its generic characters. No description, however minute and laboured, can possibly, in such cases, compensate for an absence of figures. The eye takes in at a glance distinctive ideas of relative form and proportions from figures, when even the most careful description by itself would fail to give a clear conception of them. MAGO INTENTA, sp. n. (Plate XXXI. fig. 14.) Adult male, length 2\ lines. The cephalothorax is deep red-brown behind and on the sides, and strongly suffused with blackish on the upperside of the caput (or P R O C ZOOL. Soc-18S2, No. XXX. 30 |